First Factory (Laylax) Tokyo Marui GBB M4A1MWS Inner Barrel 250mm(Inner φ6.03mm)

Inner diameter is designed with φ6.03mm with Precision ±0.01mm Tolerance! (TM Original is Φ6.08mm)
Designed with length to improve airtightness
Solid BB stability and accuracy, made with enhanced stainless steel material!

COMPATIBLE MODEL

• GBB M4A1 MWS (TOKYO MARUI)
• GBB TYPE89 (TOKYO MARUI)